Memberium’s Private Comments feature gives you the ability to easily make comments for any page or post private, so that only the administrators, the author of the page/post, and the author of the comment can see the comment on the page.
Private Commenting can be turned on in two places depending on how you want the feature to behave.
The first place you can turn on this feature is at the user level, which will force all comments made by that user to be private.
Per Page/Post Private Commenting
The second place you can turn on this feature is at the page/post level, which will force all comments made on that page/post to be kept private.
Private comments are displayed with a class of “memberium_private_comment”, allowing you to style them as you please.